2012 Fiscal Year Final Research Report
Observational and experimental study on water contentin the Earth's mantle
| Project/Area Number |
22340124
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | Kyoto University |
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Principal Investigator |
TOH Hiroaki 京都大学, 大学院・理学研究科, 准教授 (40207519)
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| Co-Investigator(Kenkyū-buntansha) |
HAMANO Yozo 海洋研究開発機構, 地球内部ダイナミクス 領域, 上席研究員 (90011709)
YOSHINO Takashi 岡山大学, 地球物質科学研究センター, 准教授 (30423338)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 内部構造 / 電気伝導度 / マントル遷移層 / 含水率 / 海底電磁気観測 / 高温高圧室内実験 |
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| Research Abstract |
Water in the Earth’s mantle as a trace element significantly modifies physical properties of our mantle as well as its convection mode. In this study, we focused on the mantle transition zone, which has been revealed to have high potential for water storage, and aimed at delineating its water content by both seafloor electromagnetic (EM) observation and high-pressure/temperature experiments. The laboratory experiments showed that a small amount of water (<0.1 wt%) cannot have a significant impact on electrical conductivity of the mantle minerals in the transition zone, while the seafloor EM observation revealed a relatively dry (up to a few permil) transition zone beneath the Northwest Pacific Basin.
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[Journal Article] Effect of iron content on electrical conductivity of ferro-periclase with implications for the spin transition pressure2011
Author(s)
Yoshino, T., Ito, E., Katsura, T., Yamazaki, D., Shan, S., Guo, X., Nishi, M., Higo, Y., Funakoshi, K
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Journal Title
J. Geophys. Res
Volume: 116
Pages: B04202
DOI
Peer Reviewed
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